Method and apparatus for sealing perforations in a well casing

• US 3,292,700 A
• Filed: 03/02/1964
• Issued: 12/20/1966
• Est. Priority Date: 03/02/1964
• Status: Expired due to Term

• Current Assignee: William B. Berry
• Original Assignee: William B. Berry
• Inventors: Berry, William B.
• Application Number:
  US04/348,493
• Time in Patent Office: 1,023 Days
• US Class Current: 166/284
• CPC Class Codes: E21B 43/261 Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation

Claims

3. APPARATUS FOR TEMPORARILY SEALING THE PERFORATIONS IN THE CASING OF A WELL COMPRISING A CARRYING MEMBER POSITIONED WITHIN THE CASING IN THE VICINITY OF THE PERFORATIONS, A PLURALITY OF SEALANT MEMBERS DETACHABLY CONNECTED TO SAID CARRYING MEMBER BY BREAKABLE ELEMENTS, MEANS CONNECTED TO SAID CARRYING MEMBER FOR RAISING SAID CARRYING MEMBER IN THE CASING AND MOVING SAID SEALANT MEMBERS THROUGH THE PREFORATED PORTION OF THE CASING, SAID SEALANT MEMBERS BEING DRAWN INTO ENGAGEMENT WITH SAID PERFORATIONS BY THE FLOW OF FLUID FROM THE CASING THROUGH THE PERFORATIONS CONTEMPORANEOUS WITH THE RAISING OF SAID CARRYING MEMBER IN SAID CASING, THE PRESSURE OF THE FLUID FLOWING FROM THE CASING THROUGH THE PERFORATIONS BEING OF SUFFICIENT MAGNITUDE TO OVERCOME SAID BREAKABLE ELEMENTS AND THE MOVEMENT AND FORCE IMPARTED TO SAID SEALANT MEMBERS BY THE RAISING OF THE CARRYING MEMBER TO EFFECT A SEPARATION OF SAID SEALANT MEMBERS FROM SAID CARRYING MEMBER.

18. THE METHOD OF TEMPORARILY SEALING THE PERFORATIONS IN THE CASING OF A WELL WHICH COMPRISES LOWERING UNDER POSITIVE CONTROL TO A POINT BELOW THE PERFORATIONS A MEMBER HAVING A PLURALITY OF SEALANT MEMBERS DETACHABLY CONNECTED THERETO AND DEPENDING THEREFROM, ELEVATING THE CARRYING MEMBER AND MOVING THE SEALANT MEMBERS THROUGH THE PERFORATED AREA OF THE CASING WHILE FLOWING A FLUID FROM THE CASING THROUGH THE PERFORATIONS TO MOVE THE SEALANT MEMBERS INTO ENGAGEMENT WITH THE PERFORATIONS FOR CLOSING SAME WHILE SEPARATING THE SEALANT MEMBERS FROM THE CARRYING MEMBER.